Hair dryer



FIG. 1 is a perspective view of a hair dryer showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom view. 

The ornamental design for a hair dryer, as shown. 